I noticed that my TI Fat ("new" style frame) seatstays flex visibly with the application of the XTR V-brakes. There's a marked difference in the feel of the levers front vs. back.

I have yet to test it out, but I just found a vintage Gorilla booster on Ebay and installed last night. Looking forward to seeing if this makes a difference - and even if it doesn't, I guess I'll be glad to know that I'm not flexing the stays as much.

Anyone else observe this on their bikes? My Wicked doesn't flex at all - but the Deore XT cantilevers probably aren't exerting as much force as V-brakes....